Pulse delay measurements in the zero-material-dispersion region for germanium- and phosphorus-doped silica fibres

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Abstract
Wavelength-dependent pulse dispersion in germanium- and phosphorus-doped silica fibres of different concentrations was measured using mode-locked subnanosecond pulses in the 1.064–1.55 μm wavelength range. Zero dispersion for GeO2-SiO2 fibres was observed in the 1.3–1.33 μm region depending on the concentration. P2O5-doped silica fibres showed zero dispersion near 1.28 μm, independent of doping concentration.